SPINE: Sacrum

C-47Sacral Agenesis or Hypoplasia
C-48-1Sacral Deformity (Curved or Sickle-Shaped Sacrum)
C-48-2Sacrococcygeal "Tail" or Appendage
C-49-1Sacroiliac Joint Disease (Erosion, Widening, Sclerosis, and/or Fusion)
C-49-2Sacroiliac Joint Abnormalities - Symmetrical Involvement
C-49-3Sacroiliac Joint Abnormalities - Asymmetrical Involvement
C-49-4Sacroiliac Joint Abnormalities - Unilateral Involvement
C-50Sacrococcygeal or Presacral Mass (See also C-51)
C-51Sacral Neoplasm (See also C-50)